Vocab
This is when a substance or substances undergoes a change into a different substance or substances.
What is a chemical reaction?
This kind of reaction involves a release of thermal energy. (i.e. thermal energy is a product)
What is an exothermic reaction?
_C + _O₂ → _CO₂
C + O₂ → CO₂
This scientist invented dynamite.
Who was Alfred Nobel?
This type of property can be measured without changing the identity of a substance.
What is a physical property?
This kind of reaction involves a consumption of thermal energy. (i.e. thermal energy is a reactant)
What is an endothermic reaction?
_Zn + _HCl → _ZnCl₂ + _H₂
Zn + 2HCl → ZnCl₂ + H₂
This scientist has been known as a "forgotten genius."
Who was Percy Julian?
This type of property can only be observed when a substance undergoes a chemical reaction.
What is a chemical property?
What type of reaction involves mixing something with a low pH with something with a high pH? Usually, the result has a neutral pH.
What is an acid/base reaction?
_H₂ + _O₂ → _H₂O
2H₂ + O₂ → 2H₂O
DAILY DOUBLE
This scientific law describes that matter may not be created or destroyed;
i.e. atoms in reactants = atoms in products
What is the Law of Conservation of Matter?
This is the word that describes the substances that come before a chemical reaction.
What are reactants?
The reactants of this type of reaction are iron, water, and oxygen. The product is a reddish-brown, soft material.
What is rusting?
_CH₄ + _O₂ → _CO₂ + _H₂O
CH₄ + 2O₂ → CO₂ + 2H₂O
These are the three ways that atoms may behave during a chemical reaction.
What is breaking apart, joining together, and switching places?
This is the word that describes the substances that result after a chemical reaction.
What are products?
These are the three conditions a chemical reaction may need in order to occur.
What are mixing, cooling, and heating?
_Fe + _Cl₂ → _FeCl₃
2Fe + 3Cl₂ → 2FeCl₃
These are at least three ways to tell whether a chemical reaction has occurred.
What are measuring/observing some of the following?
density, melting point, boiling point, color, pH, state (solid/liquid/gas), smell ... or any other intensive property